With regards to CHEs , MVBs , compact UV globes, T8 UV globes and T5HO UV globes, I'd be very wary of anything sold on Ebay or in shops that doesn't come with the following branding on the box and glass
Exo Terra
Zoo Med
Arcadia .

The cheap "no-brand" and "shop brand" stuff may look similar and the sellers may claim they are exactly the same , but there is a reason why they are cheaper = QUALITY is much worse.

In regards the cheap Ebay CHE, the risk is it will fail and overheat and become a fire risk.